Instructions / Assembly

47
INSTALLATION INSTRUCTIONS
Water Supply
CAUTION:
This water heater MUST ONLY be used with the following
water supply conditions to prevent product damage and
operation failure.
• Clean, potable water free of corrosive chemicals, sand,
dirt, and other contaminates.
• Inlet water temperatures above 32°F (0°C), but not
exceeding 120°F (49°C).
• DO NOT reverse the HOT and COLD water connections.
• DO NOT connect this water heater to water lines
previously used for space heating. All water piping and
components shall be suitable for potable water.
• With recommended water quality (See chart above).
Water Quality
Plumbing
Water Supply
Water quality must be taken into account when
installing and maintaining the water heater. Water
conditions outside of the levels specified below
affect and may damage the water heater. Please
note that the limited warranty provided with the
water heater does not cover defects, malfunctions or
failures resulting from water conditions that are not in
accordance with the specifications in the table below
If you nonetheless install this water heater where the
water conditions are not within the levels specified in
the table below, Rheem recommends that you take the
following steps:
Install a water treatment device or water softener at
the same time as the original installation of the water
heater. Rheem offers a water treatment accessory that
can be installed with the water heater. (See below).
Flush the water heater’s heat exchanger regularly.
Rheem offers a flush kit and isolation valves to help
remove scale build up. (See below)
Chart for Recommended Water Quality Levels
pH
(Total Dissolved
Solids) TDS
Free Carbon
Dioxide (CO
2
)
Total
Hardness
Aluminum Chlorides Copper Iron Manganese Zinc
6.5–8.5 Up to 500 mg/L Up to 15 mg/L
Up to
200 mg/L
0.05 to
0.2 mg/L
Up to
250 mg/L
Up to
1.0 mg/L
Up to
0.3 mg/L
Up to
0.05 mg/L
Up to
5 mg/L
Cited reference: National Secondary Drinking Water Regulations
Accessory Kit Replacement Filter Tankless Flush Kit Tankless Isolation Valve
AllClear Water Treatment Kit RTG20251 RTG20252
RTG20124 RTG20220AB
Scale Prevention Device RTG20246 RTG20247
Accessory part numbers listed below. See Parts and Accessories Catalog for more information.